- Register `app://` protocol for secure file handling in production.
- Adjust icon paths to support macOS and Windows/Linux distinctions.
- Enhance security by validating file paths under the `out/` directory.
- Replace `file://` accesses with the `app://` protocol.
- Update `package.json` build scripts for platform-specific builds and refined output directory structure.
- Modify main and login window settings for improved compatibility across all platforms.